Decimal Dash Lesson Plan Decimal Dash!
Lesson Plan • 5th Grade
30 Minutes
Learning Objective
Students will be able to read, write, and compare decimals to the thousandths place, and apply this knowledge to solve problems.
Why This Matters
Decimals are everywhere, from prices at the store to sports scores! Understanding them helps us make sense of the world around us and builds a strong foundation for future math.
Materials
Decimal Dash! Slide Deck
Decimal Detective Worksheet
Decimal Detective Answer Key
Whiteboards or scratch paper
Markers or pencils
Teacher Preparation (10 mins)
Review the Decimal Dash! Slide Deck and familiarize yourself with the content and teacher notes.
Print copies of the Decimal Detective Worksheet and Answer Key for each student.
Ensure whiteboards and markers (or scratch paper and pencils) are available for all students.
Confirm projector and computer are working for the slide deck presentation.
Instructional Steps
1
Introduction: The Decimal Dilemma
5 Minutes
Display Slide 1: Title Slide and greet students.
Use Slide 2: The Decimal Dilemma to engage students with a real-world scenario. Ask students: "When have you seen decimals outside of math class?" Allow a few student responses.
Introduce the lesson objective using Slide 3: Our Goal Today .
2
Understanding Decimals
10 Minutes
Use Slide 4: What Are Decimals? to explain decimals as parts of a whole.
Guide students through Slide 5: Place Value Power , focusing on tenths, hundredths, and thousandths. Use the script to explain each place value.
Practice reading and writing decimals with Slide 6: Read It, Write It . Have students practice on whiteboards or scratch paper. Provide immediate feedback.
Explain comparing decimals using Slide 7: Comparing Decimals , emphasizing lining up decimal points and comparing from left to right.
3
Decimal Detective Activity
10 Minutes
Distribute the Decimal Detective Worksheet .
Explain the instructions: Students will work individually or in pairs to solve the problems, which involve reading, writing, and comparing decimals.
Circulate the room, providing support and answering questions as students work.
After 7 minutes, bring the class back together to quickly review some answers using the Decimal Detective Answer Key . Focus on common misconceptions.
4
Cool Down & Wrap-up
5 Minutes
Distribute the Cool Down: Decimal Check-in .
Have students complete the cool-down independently.
Collect the cool-downs as an exit ticket to assess understanding.
Conclude the lesson by reiterating the importance of decimals in everyday life.
Decimal Dash Slide Deck Mathematics • Grade 5
Decimal
Dash!
Your Race to Understanding Decimals!
Teacher Notes: Welcome students and set an energetic tone. Briefly introduce the topic of decimals and how they are important in everyday life. Mention that this lesson will be a 'dash' to master them!
The Decimal Dilemma
Where do we see decimals in the real world?
Money?
Sports?
Measurements?
Share your ideas!
Teacher Notes: Ask students to think about where they encounter decimals. Prompt with examples like money, sports scores, or measurements. Encourage students to share to spark interest.
Our Goal Today
By the end of this lesson, you will be able to:
01
Read decimals to the thousandths place.
02
Write decimals to the thousandths place.
03
Compare decimals to the thousandths place.
Teacher Notes: Clearly state the lesson's learning objective. Explain that by the end of this 'dash,' they'll be masters of reading, writing, and comparing decimals up to the thousandths place.
What Are Decimals?
Decimals are numbers that represent parts of a whole.
They live between whole numbers on the number line.
0
Decimals Dash Here!
1
Teacher Notes: Define what a decimal is: a way to show parts of a whole. Use the example of a whole pizza and slices to illustrate this concept visually or verbally.
Place Value Power
To the right of the decimal point, we have:
Tenths
1 digit after decimal
0.1
Hundredths
2 digits after decimal
0.01
Thousandths
3 digits after decimal
0.001
Listen for that "TH" at the end of the name!
Teacher Notes: Introduce decimal place values: tenths, hundredths, thousandths. Emphasize the 'th' sound. Give simple examples for each.
Read It, Write It!
How do we say these?
0.7
0.25
0.009
Write the decimal:
"Two tenths"
"Fifty-six hundredths"
"One hundred four thousandths"
Decimal Detective Worksheet Decimal Detective
Dash to the Finish Line!
Name
Date
Part 1: Read and Write Decimals
Convert between word form and standard form.
1. 0.6
2. Two hundredths
3. 0.81
4. One hundred thirty-five thousandths
5. 0.073
Part 2: Compare the Decimals
Use <, >, or = to compare. Tip: Line up the decimals!
0.4
0.40
0.15
0.105
0.89
0.9
2.305
2.35
0.007
0.070
Part 3: Order Up!
Order from least to greatest.
11. 0.5, 0.05, 0.55
Write ordered list here...
12. 0.123, 0.132, 0.103
Write ordered list here...
Decimal Detective Answer Key Decimal Detective
Answer Key • Teacher Resource
Part 1: Read and Write Decimals
1. 0.6
Answer: Six tenths
Thought Process: The 6 is in the tenths place, so we read it as "six tenths."
2. Two hundredths
Answer: 0.02
Thought Process: Hundredths means two decimal places. "Two" goes in the hundredths place. So, 0.02.
3. 0.81
Answer: Eighty-one hundredths
Thought Process: The 8 is in the tenths and 1 is in the hundredths. Read as a whole number (eighty-one) then the place of the last digit (hundredths).
4. One hundred thirty-five thousandths
Answer: 0.135
Thought Process: Thousandths means three decimal places. "One hundred thirty-five" fills those places. So, 0.135.
5. 0.073
Answer: Seventy-three thousandths
Thought Process: The 0 is in the tenths, 7 in the hundredths, and 3 in the thousandths. Read the number (seventy-three) and state the last place value.
Part 2: Compare the Decimals
6. 0.4 = 0.40
Thought Process: Adding a zero to the end doesn't change value. 0.4 is equivalent to 0.40.
7. 0.15 > 0.105
Thought Process: Line up: 0.150 vs 0.105. Tenths are same (1). Hundredths: 5 is greater than 0.
8. 0.89 < 0.9
Thought Process: Line up: 0.89 vs 0.90. Tenths place: 8 vs 9. Since 9 > 8, 0.9 is greater.
9. 2.305 < 2.35
Thought Process: Line up: 2.305 vs 2.350. Hundredths place: 0 is less than 5.
10. 0.007 < 0.070
Thought Process: Line up. Tenths same (0). Hundredths place: 0 is less than 7.
Part 3: Order Up!
11. 0.5, 0.05, 0.55
Answer: 0.05, 0.5, 0.55
Thought Process: Convert to thousandths: 0.500, 0.050, 0.550. Ordering: 0.050, 0.500, 0.550.
12. 0.123, 0.132, 0.103
Answer: 0.103, 0.123, 0.132
Thought Process: All in thousandths. Tenths same (1). Hundredths: 0 is smallest, then 2, then 3.
Decimal Dash Exit Ticket Decimal Check-in
Exit Ticket • Final Dash
Name
Date
1
Write the decimal "thirty-six thousandths" in standard form.
2
Read the following decimal aloud to yourself, then write it in word form: 0.142
3
Use <, >, or = to compare the following decimals:
0.7
0.701
4
Order the following decimals from least to greatest:
0.8, 0.08, 0.88
Write them in order here...
You crossed the finish line!
